PROX forged piston, reference 01.7398.A, designed for engine reconditioning of Cross machines. Made from aluminum alloy, this piston features a dome-shaped head and an oversize A (Ø 71.94 mm) to restore the original bore during refurbishment. Its design aims to minimize friction while providing geometry suited to the high demands of competitive 2-stroke engines.

• Compression: standard
• Diameter: Ø 71.94 mm (oversize A)
• Material: aluminum
• Specificity: dome-shaped head
• Usage: equivalent first fit reconditioning, Cross universal

This piston is aimed at riders looking for a replacement part that faithfully matches the original configuration for their cylinder. It is particularly suitable for BETA RX / RR 300 2T models (2024), listed among the main compatibilities. Before installation, always check the piston-cylinder clearance, the condition of the rings, and the flatness of the cylinder head to ensure proper break-in and operational stability.

Product intended for workshops and experienced DIYers: installation and adjustments must comply with manufacturer tolerances to ensure engine longevity. For any intervention, use the appropriate tools and follow the maintenance recommendations of the motorcycle manufacturer.